NTC Probe Wiring for LTC2984
- Review the interface topology and isolation domains
- Add required support parts: termination, biasing, and decoupling
- Connect controller, isolator, bus, and power nets correctly
- Verify completeness and ERC readiness
Started implementing a plan
# Goal
- Wire the isolated CAN interface between Isolated CAN #1 connector, U14 (MCP2518FDT-H/SL), and IC3 (ISOW1044BDFMR), ensuring the inclusion of all required support components such as termination resistors, bias circuits, decoupling capacitors, and other associated passive elements.
# Implementation plan
1. **Review Interface Architecture**
1. Confirm the connection topology of the CAN interface among the Isolated CAN #1 connector, U14, and IC3.
2. Document the required signal paths, power, and ground isolations for the isolated domain.
2. **Identify and Add Supporting Passive Components**
1. Add termination resistors on the CAN bus, typically a 120 Ω resistor at one end, ensuring correct bus termination.
2. Include biasing resistors to maintain the CAN bus idle state as per design recommendations.
3. Select and add decoupling capacitors for both U14 and IC3 for proper power supply filtering.
4. Include any additional supporting resistors and capacitors for signal integrity and option for clock support or filtering if needed.
3. **Connect CAN Interface and Isolation Components**
1. Wire the CAN transceiver signals from U14 to the Isolated CAN #1 connector using proper net connections.
2. Route the isolated signals through IC3 ensuring correct isolation between the CAN bus sides.
3. Validate that the connection of power/ground respects the isolation boundaries as per IC3's datasheet and design guidelines.
4. **Review and Verify Design Integration**
1. Review the schematic for completeness, ensuring that all required supporting components are added.
2. Validate that the isolation domain is properly implemented and the bus signals are free of errors.
3. Perform an Electrical Rule Check (ERC) to verify correct connections and component ratings.
# Success criteria
- The CAN interface wiring correctly interconnects the Isolated CAN #1 connector, U14, and IC3 with all passive components properly added.
- The design includes the required termination, bias, decoupling, and support circuits as per CAN bus isolation guidelines.
- The schematic passes ERC and meets the design requirements for isolated CAN operation.
Task completed.
0:18
Execution stopped by user.
1:25
Diagram
Set System Architecture to "flowchart TD U14["U14 MCP..."
0:10
Set System Architecture to "flowchart TD U14["U14 MCP2518FD CAN Controller"] -->|TXCAN RXCAN| IC3["IC3 ISOW1044 Isolated CAN Transceiver"] IC3 --..."
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